Jetty with stabilizer



Se t. 3, 1946. G. w. REHFELD 2,407,034

JE'ITY WITH STABILIZER Filed Sept. 4, 1943 v 2 Sheets-Sheet 1 INVENTOR:

A TTORNEYS.

Sept. 3, 1946.

G. W. REHFELD JETTY WITH STABILI'ZER Filed Sept. 4, 194:5

2 Sheets-Sheet 2 INVENTOR:

ATTORNEYS. v

Patented Sept. 3, 1946 UNITED STATES PATENT OFFICE Claims. 1

This invention relates to jetties for controlling the banks of streams, navigable rivers and lands subject to erosion. Such jetties usually consist of a frame having lower portions adapted for support on the river bed and upper portions connected by lacing for retarding flow and causing deposit of silt and debris. When the river bed contains quick sand, the current keeps the sand in motion so that the jetties settle into the sand until stopped by underlying strata of coarser sand or gravel. This settlement reduces the jetties or completely eliminates the effectiveness thereof, and many times it is necessary to recap the sunken jetties with one or more superimposed jetties.

Also a river bed may be of a character so that it provides insufficient anchorage for the jetties especially when the current is swift and the jetties are soon moved out of their desired locations.

It is, therefore, a principal object of th present invention to provide a jetty with stabilizing means arranged to control and maintain a desired position thereof.

Further objects of the invention are to provide leg portions of the jetties with terminals for anchoring the footing means therefor; to provide a jetty having arm portions, capable of protecting the hulls of boats when the jetties are applied in a navigable stream, and to provide a jetty with footing elements having the required weight or buoyance necessary in maintaining substantial stability relatively to the supporting surface.

In accomplishing these and other objects of the invention hereinafter pointed out, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

Fig. 1 is a perspective view of a jetty embodying the features of the present invention and equipped with stabilizing means capable of weighting the jetty and providing a positive footmodified forms of footing element, particularly illustrating attachment of the jetty thereto.

Referring more in detail to the drawings;

l designates a jetty which may comprise a plurality of elongated or rod-like members 2, 3 and 4 arranged in crossed relation to provide an open frame-work havingsubstantially tripod leg portions 5, 6 and 1, and upwardly and outwardly directed arm portions 8, 9 and Ill. The members 2, 3 and 4 are secured together at the crossing points thereof in any suitable manner, for example, by the welds as indicated at H, Fig. 1. The ends of the leg and arm portions of the jetty are preferably shapedto form hooks, eyes or loops I2 which serve for attachment of stabilizing elements [3, later described.

While the ends I! may be omitted from the arm portions 9, they are desirable on jetties installed in navigable streams since they prevent penetration of the arms in case a vessel should accidentally float into the jetty. The curved facilitate placement thereof particularly when the jetties are installed below the water level.

The jetty arm and leg portions are provided with lacing [4 that may be arranged in any suitable manner to brace the members and provide water retarding means for effecting settlement of materials carried by a stream.

In order to facilitate application and positive anchorage of the lacing, the arm and leg portions of the jetties as well as the curved terminals thereof may be provided with substantially U- shaped clips I5 as shown in Fig. 1, having bendable fingers l6 that are clinched over the lacing as shown in Fig. 2. The clips at the terminal ends of the arm and leg portions support the outermost lacing of the jetty so as to increase the effective dimensions thereof and maintain a maximum spread of the lacing with a given length jetty member.

In the form of the invention illustrated in Fig. 1 the stabilizing elements l3 may comprise one or more blocks l I secured to the jetty. The

They also increase the water retard- 3 bed. The stabilizing blocks thus provide footing elements for the jetty to support it upon the river bed and the weight thereof assures retention of the jetty in a position in which it is placed.

The extended area of the stabilizing elements provides sufiicient spread relatively to the supporting properties of the river bed so that they are retarded from sinking and thereby prevent reduction in the efiective height of the jetty thus equipped. I

The form of the jetty illustrated in Fig. 5 is similar to that of the jetty just described with the exception that the stabilizing elements l8 are formed of a material having a tendency to float when supported upon a stream having a mud or quick sand bottom. I find that onesuitable material for constructing the stabilizers is wood, as wood has a tendency to float even in quick sand. The footing elements may be made of such size that the supporting surfaces thereof will provide the desired buoyancy for support in very loose river sand or mud.

In the illustrated instance, the stabilizers comprise a relatively long timber I9 having sufficient length to support the ends of the jetty members 3 and 4, and a shorter timber 20 is provided for supporting the member 2 thereon. The timbers may be attached in any suitable manner, for eX- ample, by extending wire strands 2| around the timbers and through the curved ends of the le portions of the jetties as illustrated in Fig. 6. In addition the lower runs 22 of the lacing may be anchored to the timbers l9 and 20 by staples 23 that straddle the lacing and are driven into the timbers as shown in Fig. 5.

In the form of jetty illustrated in Figs. 1 to 6, inclusive, the rod-like members 2, 3 and 4 are preferably welded in assembly near the site of installation, after which lacing is applied and the stabilizers are poured around the curved ends of the jetty members. After setting of the concrete the jetties are secured together by lines of rods or cables 24, as in conventional practice. The jetties are then moved into position on the river bed and the lines 24 are suitably anchored to the river bank.

In the form of the invention illustrated in Fig.

5, the timbers l9 and 20 are secured to the assembled jetties by applying the wire ties 2| and driving the staples 23 as shown.

While I have illustrated a single form of jetty structure, it is obvious that jetties constructed of various structural members, such as angle iron, wood, concrete, plastic, or the like, may be substituted for the rod-like members illustrated and described without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. A jetty including a plurality of rod-like members arranged in crossed relation and having curved terminals, bearing means for supporting the jetty, and means connecting the bearing means with the curved terminals of the rod-like members.

2. A jetty including a plurality of rod-like members arranged in crossed relation to provide a plurality of radially extending leg and arm portions having curved terminals the curved terminals on the arm portions forming bumpers and the curved terminals on the leg portions providing means for anchoring the jetty.

3. A jetty including a plurality of rod-like members arranged in crossed relation to provide a plurality of leg and arm portions, and concrete blocks on said leg portions to support said jetty, said leg portions being of a shape to form a key with said blocks.

4. A jetty including a plurality of rod-like members arranged in crossed relation to provide a plurality of leg and arm portions, concrete blocks on said leg portions to support said jetty, said leg portions being of a shape to form a key with said blocks, and lacing connecting said arm and leg portions, with portions of said lacing being connected With said blocks.

5. A jetty including a plurality of members arranged in crossed relation and having reversely curved terminals, bearing means for supporting the jetty, and means connecting the bearing means with the reversely curved terminals of said members.

GEORGE W. REHFELD. 

